Blunt sure has been put to the test since becoming an official U.S. citizen. First she epically failed when Jimmy Kimmel quizzed her on popular American knowledge like what a Big Gulp is and what MLB stands for, and now Ellen DeGeneres is giving the actress an exam of her own.

When Blunt appeared on The Ellen DeGeneres Show, she bragged about how much she knew about American history, saying, “I know more about the constitution and government than most Americans.”

Emily Blunt with a surprise guest

Michael Rozman/Warner Bros

But DeGeneres didn’t pay attention too much to the hard facts – she wanted to know if Blunt knew patriotic songs.

“I feel like this is going to get me in trouble,” Blunt said nervously.

DeGeneres convinced the Sicario actress, 32, to dress up like Lady Liberty and sing patriotic songs in celebration of her new status.

As Blunt attempted to sing along to “Yankee Doodle Dandy,” a man dressed as Uncle Sam walked up to her and shouted in her face, basically scaring the American out of her.

Blunt screamed back in his face before falling into a pit of laughter.

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“I think I just peed myself,” she exclaimed as DeGeneres cracked up in her seat.